Figure 1.

Transverse Sections of Vascular Tissues from 6-Week-Old Plants or 7-d-Old Seedlings of the Wild Type and hca2.

(A), (B), (D), and (E) Resin-embedded transverse sections of the basal portion of the inflorescence stem from wild-type ([A] and [B]) and hca2 ([D] and [E]) plants stained with Toluidine blue.

(B) and (D) Higher magnifications of wild-type and hca2 vascular tissues, respectively.

(C) and (F) Hand-cut transverse sections of the basal portion of the inflorescence stem from wild-type (C) and hca2 (F) plants stained with Aniline blue and observed under UV light.

(G) and (H) Resin-embedded transverse sections of vascular bundles of petioles from wild-type (G) and hca2 (H) plants.

(I) and (J) Resin-embedded transverse sections of main veins of rosette leaves from wild-type (I) and hca2 (J) plants.

(K) and (L) Resin-embedded transverse sections of vascular bundles of hypocotyls from 7-d-old wild-type (K) and hca2 (L) seedlings.

(M) and (N) Resin-embedded transverse sections of vascular bundles of roots from 7-d-old wild-type (M) and hca2 (N) seedlings.

C, cortex; If, interfascicular fiber; Pc, (pro)cambium; Pi, pith; Ph, phloem; S, starch sheath; Vb, vascular bundle; Xy, xylem; Fc, fascicular cambium; Ic, interfascicular cambium. Bars = 200 μm in (A), (C), (D), and (F), 50 μm in (B), (E), and (G) to (J), and 20 μm in (K) to (N).